William f



(Nd Model.) v

' W F DRAPBR SUPPORT FOR SPINNING SPINDLES.

No. 428,556. Patented May 20, 1890.

W/iiD-EEEESI UNITED STATES ATENT GFFICE.

WILLIAM F. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO GEORGE DRAPER& SONS, OF SAME PLACE.

SUPPORT FOR SPI NNINQ-SPINDLES.

SPECIFICATION forming part of Letters Patent N 0. 428,556, dated May 20,1890. Application filed January 17,1888. Serial No. 261,035. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM F. DRAPER,

of I-Iopedale, county of Worcester, State of Massachusetts, haveinvented an Improvement-in Supports for Spinning-Spindles, of which thefollowing description, in connection with the accompanying drawings, isa specification, like letters on the drawings representing like parts.

This invention has for its object to provide a sleeve-whirl spindle suchas employed in spinning-machines with a bearing capable of letting thespindle run loosely with the minimum of friction, thereby reducing notonly the power employed to rotate the spindle, but the wear of theactuating parts. I have by experiment ascertained that the greatestspeed forspinning-spindles with the least friction and least loss ofpower may be gainedby the employment, within the sleeve-whirl andbetween the spindle and the bolster case or support, of a bolstercomposed of or containing rolling or rotating surfaces. Preferably Ishall employ two sets of rolling surfaces.

My invention consists, essentially, in a hollowbolster-case and avertical spindle having a pintle and a sleeve-whirl connected theretoabove the end of the pintle, combined with a bolster inserted within thesaid bolster-case and receiving the pintle of the spindle and providedwith rolling surfaces located within the bolster-case and between it andthe pintle of the spindle, a step at the lower end of the bolster and onwhich the said pintle rests, and a plate located directlyin the line ofthe pull of the band, as will be described.

Figure 1 in vertical section shows a bolsterca'se, a rail orsupport forit, and a bolster em-' bodying my invention, the spindle, with theexception of the whirl, being in elevation. Fig. 2 is a top or plan viewof Fig. l with the spindle removed. Fig. 3 shows one of the spiders forholding the rolling surfaces; Fig. 4, details of the separating disk orplate. Figs. 5 and 6 show some of the rolling surfaces de tached; Fig.7, a top or plan view similar to Fig. 2 of a modified form of myinvention, and

Fig. 8 a form of spider suitable for holding a double set of rollingsurfaces.

The rail A, the bolster case or support B secured to it by the nut C,the spindle D, having the sleeve-whirl D, its pintle D and a step F,upon which the lower end of the pintle D rests, are and may be all asusual.

My improved bolster-bearing having rolling surfaces, as herein shown, iscomposed of a series of rolls or cylinders, as (1, held in operativeposition within the bolster case and within the whirl by means of aspider Z), as herein represented, being made as a notched ring, (shownbest in Fig. 3,) the said spider keeping the rolling surfaces in placewhen the spindle is removed, the annularly grooved portions a of therolling surfaces entering the notches at the periphery of the spider. Ishall employ these rolling surfaces as a lateral support for the spindleboth above and below the line of band-pull, and in separating one set ofrolling surfaces from the other vertically I introduce between them aplate, as cl, and preferably to reduce friction the sides of the saidplate will be made cone-shaped, or else the end of the rolls orcylinders will be made cone-shaped, as shown by the lowermost set ofrolling surfaces e, each set of said rolling surfaces being held by alike spider, and by locating this platecldirectly within the pull of theband on the whirl the liability of the rolling surfaces to cramp in thesupporting-case is reduced to the minimum. The rolling surfaces held bythe spider are a loose fit in the bolster case or holder and afford asufficient amount of looseness to enable the spindle to run steadilywith an unbalanced load.

In the modification represented in Fig. 7 I have shown a bolster havingtwo sets of rolling surfaces arranged in contact between the interior ofthe bolster-case and the exterior of the spindle, the innermost of therolls or cylinders entering the notches 4, and the outermost rolls orcylinders the notches 5 of the spider shown in Fig. 8. These single ordouble series of rolling surfaces interposed between the spindle and theinterior of the bolster-case and within the sleeve of the whirl reducethe power required to rotate the spindle and the wear of the parts tothe minimum. The rolling surfaces may or may not run in oil.

I do not intend to limit my invention to the exact form of rollingsurfaces shown to constitute a lateral bearing for the spindle, andinstead of the particular rolls or cylinders shown, or the particularspiders shown, I may employ those of any other usual or well-knownconstruction.

The power required to rotate the spindle will be applied to the whirl inusual manner by a band, and it will be noticed that the band pull willbe in the direct line of the diameter of the rolls and of the spindlewithin the sleeve-whirl, and also that the band-pull is entirely withinthe ends of the bearing-surfaces, represented as rolls, so that thebandpull cannot possibly exert any strain which would tend to cramp thespindle in its bearings, as would be the case were the whirl attached tothe spindle beyond and entirely outside the ends of the rolling surfacesconstitut ing' parts of the bolster-bearing.

I claim-- The hollow bolster'case B, the vertical spindle D, having apintle and a sleeve-whirl D, surrounding the pint-1e, combined with abolster having" rolling surfaces and inserted within the saidholster-case, the bolster receiving the pintle of the spindle, therolling surfaces being located between the bolsterease and the pintle ofthe spindle, a step below the bolster on which the pintle of the spindlerests, and the plate (I, located directly in the line of the pull of theband, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

\VILLIAM F. DRAPER.

\Yitnesses:

F. J. DUTCHER, A. W. BEARDSELL.

